| Issue |
Korean Journal of Chemical Engineering,
Vol.21, No.5, 989-993, 2004
Vol.21, No.5, 989-993, 2004
Sorption and Desorption Characteristics of Cobalt in Clay: Effect of Humic Acids
The effect of humic acid (HA) on the sorption and desorption of Co(II) on kaolin was investigated. Cobaltions interact with carboxylic and phenolic groups in HA and form HA-cobalt complex. The solubility of HA was affected by the surrounding pH. The presence of HA reduced the equilibrium time for the Co(II) sorption of Co(II) on kaolin in the presence of HA. In the knetic sorption and desorption of Co(II) on kaolin, the presence of HA shortened the breakthrough of Co(II) sorption on kaolin compared to bare kaolin, and HA solution enhanced the displacement of Co(II) from kaolin compared with deionized water.
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